<?php

namespace App\Http\Controllers\admin;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;
use App\Model\Cat;

class CatController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $cats = $this->findAll();
        return view('admin.cat.cat_index')->with('cats',$cats);
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        $cats = $this->findAll();
        return view('admin.cat.cat_add')->with('cats',$cats);
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        //验证
        $cat = new Cat();
        $cat->pid=$request->pid;
        $cat->name = $request->name;
        $cat->save();
        return redirect('admin/cat');
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        $cat = Cat::find($id);
        $cats = $this->findAll();
        return view('admin.cat.cat_edit')->with('cate',$cat)->with('cats',$cats);

    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        //

       
        $cat = Cat::find($id);
        $cat->name = $request->name;
        $cat->pid = $request->pid;
        $cat->save();
        return redirect('admin/cat');
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
        //
    }

     /**
     * 找子孙栏目
     * @param $data  栏目数据源
     * @param int $id
     * @param int $lev
     * @return array
     */
    protected  function  findTree($data,$id=0,$lev=0)
    {
        static $tree=[];
        foreach($data as $k=>$v){
            if($v->pid==$id){
                $v->lev=$lev;
                $tree[] = $v;
                $this->findTree($data,$v->id,$lev+1);
            }
        }
        return $tree;
    }
    //格式化取出所有栏目
    protected function findAll()
    {
        $data = Cat::select('id','name','pid')->where('del','正常')->get();
        return  $this->findTree($data,0,0);
    }
}
